Adding-machine.



Patented May 10, 1910.

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UNITED STATES PATENT CHARLES A. BARR, OF LEAVENW'ORTH, KANSAS.

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ADDING-MACHINE.

Specification of Letters Iatent.

Patented May 1o, 1910.

Application filed November 5, 1909. Serial No. 526,412.

To all whom it mag concern:

l 3e 1t known that 1, CHARLES A. DARE, a citizen of the United .States,residing at Leavenworth, in the county of Leavenworth and State ofKansas, have invented certain new and useful Improvements in Adding-Machines, of which the following is a specification. 'My inventionrelates to improvements in adding machines, and my object is to providea simple, inexpensive device of compact form for the convenience ofbookkeepers, accountants, and the like, in adding columns of figures. 1

In the accompanying drawing, which illustrates the invention, Figure 1represents a plan view of the machine. Fig. 2 is a longitudinal sectionthereof on line 11-11 of Fig. 3. Fig section on line III-III of Fig. 2,and Fig. 4 shows a tool for turning the addingwheels.

' In carrying out the invention, I employ a case-.1, having a beveledfront side 2, so 1 that it may be employed as a ruler, said beveled sidehaving a scale '3 whereby measurements may be taken.

4, 5 and 6 designate, respectively, units, tens and hundredsadding-wheels. Each adding-wheel is carried by'a shaft 7 mounted in thetop and bottom of the case, and

containing a washer 8 whereby the addingwheel is supported above thebottom of case 1, as shown in F ig. 3; Each adding-wheel hasa circularrow of numerals 9, consisting of O to 9 inclusive, a circular row ofholes 10, and peripheral ratchet-teeth 11, the

numerals 9, holes 10, and the abrupt portions of the ratchet-teethbeingpreferably arranged in radial alinement as shown in Fig. 2.

.Adding-whe'els 4 and5 have lugs 12 and 13, respectively, each lug beinga'd acent the numeral 9 on its respectivwheel. Lugs 12 and 13 depend inthe path of lugs 14 and 15, extending laterally from the rear terminalsof a pair of propelling arms 16 and 17, respectively,slidingl'y-Inounted upon the bottom portion of the case, and retainedimposition theneon by-screws 18 and staples '19. Each screw 18extendsthrough a longitudinal slot 20 in a flange 21 on each. arm

while' staples 19' extend through longitudinal slots '22 in the forwardportions of the arms-. The forward ends of thepro-. pellingsakrms .16and l7'are held adptcent 3 is a vertical cross the ratchet-teeth oftheadding-wheels sia'n'd 6 by springs 23 and 24, respectively, bearin attheir free ends against said arms, an

secured at their opposite ends toscrews 25,.-

26 and 27 designate levers engaging the propelling-arms 16 and 17,respectively,'and pivotally-mounted upon pins 28 and 29 pro jectingupwardly from the bottom of the case.

30, 31, and 32 designate resilient arms normally engaging at their freeends to the rear side of case 1, as shown in Fig. 2.

33 designates a push-bar slidingly-mounted in the rear side of the caseand a guide 34, Which'latter is adjacent the units wheel 4. Push-bar 33is provided at 'its outer' end with a knob 35, and at its inner end witha pin 36, whichlatter is normally held in-en- 'gagement with guide 34 bya' 'ret'ractile spring 37 secured at its' ends to the back of the caseand the push-bar. 'Push bar 33 is provided with a pivotally-mounted pawl38 which is held in engagementwith' the ratchet-teeth of the units Wheel4, by a spring 39. The upper part of case 1' is pro- 'vided withsegmental :slots 40 to expose openings 10 in the adding-wheels, so thataipencil, or a tool 41 may beinserted into any of said openings for thepurpose of turning said wheels. 'Tool 41 is provided with a pin 42 forentering any-of the openings 10, theentrance of: the pin being limitedby a shoulder 43, which slides around upon the upper surface .of thecase.. 1

44 designates circular rows of numerals 0 to 9 inclusive, arrangedadjacent slots 40, the rear ends 45 of which latter act tivesightropening 46. This is accomplished by turning each wheel with thetool 41 in i the directionv of arrow at. Assuming that the first figureof a column to beadded 9 the point of the tool is inserted in theopening of the unitswheel opposite-f9 of the row 44, and the units wheelis. turned its until pin 42 contacts with the rear terminal of slot 40.This will bring the numeral. of the. units wheel into coincidence withits respective sight-opening L6. 'If the next figure to be added is 7,the point of the tool is inserted in the opening of the units wheelopposite 7 of row 4%, and the units wheel is turned until pin 42contacts with the terminal 45 of slot 40. This operation will bring thenumeral 6 on the unit's wheel into coincidence with the sight-opening46. As the units wheel is turned its depending lug12 engages the lug 14:of the propellingarm 16 and pushes the same forward to the dottedposition shown in Fig. 2, causing it to turn the tens wheel until itsnumeral 1 is brought into coincidence with its respective sight-opening4:6. The two numerals thus disclosed equal the amount of the addednumbers, which is 16. As the propellingarm-l6 moves forward, it actuateslever 26, and throws the free terminal of the same into the path of lug13, so that when the units wheel is turned to add the numeral 7 said lugwill engage the lever and re store it to normal position. As the levermoves back to normal position, it carries the propelling-arm 16therewith. While the Wheels are free to rotate in the direction .ofarrow a, they are held from backward rotation by the resilient arms 80,31, and 32. At times it is inconvenient to actuate the adding-wheelswith the tool 41, in which case the tool may be dispensed with and theoperation of turning the adding-wheels be accomplished through theintermediacy of push-bar 33 and its pawl 38.

Having thus descrlbed my invention, what I claim is 1 An adding machineconsisting of a case having slots in its top and sight-openings adjacentsaid slots, numerals arranged around said slots, a series ofadding-wheels beneath the slots of increasing denominations from rightto left and provided with rows of numerals correspondim to the numeralsarranged around the slots, said adding-wheels being provided withperipheral ratchet-teeth, lugs on all the adding- Wheels but the one ofhighest denomination, propelling-arms 'slidingly-mounted in the case totransmit motion from a wheel of lower denomination to one of higherdenomi nation, each arm being arranged in the path of a lug on one wheeland adjacent a ratchettooth of the following wheel, and levers engagingsaid arms to restore the same to normal said levers -being actuated bythe lugs which actuate the propelling-arms.

2. An adding machine consisting of a case having slots in its topandsight-openlngs adjacent said slots, numerals arranged around said slots,a series of adding-wheels beneath the slots of increasing denominationsfrom right to left and provided with rows of numerals corresponding tothe numerals arranged around the slots, said adding-wheels beingprovided with peripheral ratchet-teeth, lugs on all the addingwhcels butthe one of highest. denomination, propellingmrms slidingly-mounted iiithe case to transmit motion from a wheel of lower denomination to one ofhigher dcnoniination, each arm being arranged in the path of a lug onone wheel and adjacent a ratchettooth of the following wheel, leversengaging said arms to restore the same to normal, said levers beingactuated by the lugs which actuate the propelling-arms, and meansengaging the ratchet-teeth to prevent backward rotation of the wheels.

3. An adding machine consisting of a case having slots in its top andsight-openings adjacent said slots, numerals arranged around said slots,a series of adding-wheels beneath the slots of increasing denominationsfrom right to left and provided with rows of numerals corresponding tothe numerals arranged around the slots, said adding-wheels beingprovided with peripheral ratchet-teeth, lugs on all the addingwheels butthe one of highest denomination, propelling-arms slidingly-mounted inthe case to transmit motion from a wheel of lower denomination to one ofhigher denomination, each arm being arranged in the path of a lug on onewheel and adjacent a ratchet-tooth of the following wheel, leversengaging said arms to restore the same to normal, said levers beingactuated by the lugs which actuate the propelling-arms, and resilientarms engaging the ratchet-teeth to prevent backward rotation of thewheels.

4. An adding machine consisting of a case having segmental slots in itstop and sightopenings adjacent said slots, numerals arranged around saidslots, a series of addingwheels beneath the slots of increasingdenominations from right to left and provided with rows of numeralscorresponding to the numerals arranged around the slots, saidadding-wheels being provided with ratchetteeth and circular rows ofopenings, lugs on all the adding-wheels but the one of highestdenomination, propelling-arms slidinglymounted in the case to transmitmotion from a wheel of lower denomination to one of higher denomination,each armbeing arranged in the path of a lug on one wheel and adjacent aratchet-tooth of the following wheel, and levers engaging said arms torestore the same to normal, said levers being "actuated by the lugswhich actuate the propelling-arms; in combination with a tool" havingslots in its top and sight-openings adjacent said slots, numeralsarranged around said slots, a series of adding-wheels beneath the slotsof increasing denominations from right to left and provided with rows ofnumerals ,oorresponding to the 'liumerals arranged around the slots,said adding-wheels being provided with peripheral ratchet-teeth, lugs onall the addingwheels but the one of highest denomination,

propelling-arms slidingly-mounted in the case to transmit motion from aWheel of .lower denomination to one of higher denomination, each armbeing arranged in the path. of a lug on one Wheel and ad1acent a F. G.FISCHER,

Cox.

